The Basics of Water Flow Switches - Flow Switches

Flow switches, or flushes, like vane or paddle work only in wet piping systems. As the name is indicated, they display a reed or a remote control that gets in the way of the water and moves when it flows. However, in dry systems where water replaces quickly or is compressed when the sprinklers are activated, this powder can be damaged or interrupted - therefore, a restriction on wet song systems.

For smaller tube sizes (usually less than two inches), these switches can have a "T-touch" shape. They have a threaded inlet and a protruding paddle that connects a threaded accessory (the tee). Others have a racket and seal it with a horseshoe screw. When opened, this U-bolt holds the sensor in place, over a hole in the tube.

Orientation and placement

Palette flow switches and cables must face the water flow. However, they can cross the tube that corresponds vertically or horizontally. A local standard for these switches is just a little bit of where water enters the sprinkler system - over or after a check or isolation valve.

Activation and signaling

Water flow switches are activated when the flow exceeds a predetermined rate. However, they can also use a mechanism to delay these signals, to avoid false alarms due to pressure spikes.
They used two electrical switches: a flare or a fire alarm control panel and another that embedded a campaign or other audiovisual alarm. The flow switches connected to a control panel must have a non-silent circuit - which means that the panel cannot disable the switch's alarm signal.

Variation

T-leakage switches typically protect residential fire-fighting systems, which use small pipe sizes. They can also work on smaller lines (branch lines) in commercial systems. On the other hand, installers usually use U-screw wrenches in commercial systems, where the pipes that transport or supply the system water are connected.